JPH0123860Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a locking device for preventing an automobile seat, particularly a tiltable rear seat, from falling forward or lifting up.

B. Prior Art Similar to van-type cars and wagon-type cars, general automobiles also have a vehicle in which the seat bag is folded forward or the seat cushion is tilted with the seat bag folded to make the cargo space more widely available. is being developed. In such automobiles, a locking device is used to secure the seat so that the seat bag does not accidentally fall down when the seat is used in a seatable state, or the seat does not lift up and fall forward when an impact load is applied. is provided.

As an example of a locking device, as shown in FIG. By locking the seat bag 1a to a bracket 5 fixedly attached to the seat belt 2 and pulling the seat bag 1a rearward and downward with the band 2, the seat bag 1a can be prevented from falling forward and the seat cushion 1 can be prevented from falling forward.
There are some that are designed to prevent b from lifting up.

In the above device, since the attachment position of the hook portion 3 of the band 2 is located far from the seat 1, there are problems in that the work to engage and detach the hook portion 3 is troublesome, and the supporting force of the band 2 is weak and Due to its flexibility, there was a problem that the entire sheet 1 rattled and was unstable. When a larger load is applied,
There was also a problem where the band 2 was cut and the seat 1 was thrown forward.

There is also another device disclosed in Utility Model Application Publication No. 47-21317. This is shown in Figures 2 to 5,
A latch 9 and a lever 10 are rotatably attached to both sides of the upper part of the seat bag 6 via a shaft 7 and a rotating shaft 8. The striker assembly 14 is mounted on the upper surface of a wheel house (not shown), and a recess into which the striker 15 of the striker assembly 14 is fitted is provided in the lower part of the latch 9. 9c, and engagement surfaces 9a and 9b with which the tip of the lever 10 engages when locking on or locking off are formed on the upper side. In this locking device, when the seat bag 6 is raised, the recess 9c of the latch 9 and the striker 15 are engaged, and the tip of the lever 10 is locked onto the lock-on engagement surface 9 of the latch 9.
a to prevent rotation of the latch 9 and prevent the seat bag 6 from falling. To release the latch 9, rotate the lever 10 against the spring 13.
becomes free and rotates counterclockwise,
The tip of the lever 10 engages with the lock-off engagement surface 9b, and the engagement between the recess 9c of the latch 9 and the striker 15 is released, and the seat bag 6 falls.

Although the above locking device can prevent the seat bag 6 from falling down, there is a problem in that it cannot prevent the entire seat from lifting up. That is, latch 9
The striker 15 is formed in a shape that prevents rotation about the lower support portion of the seat bag 6, and has no ability to prevent upward movement, and vibrations in the vertical direction occur. When a large shock load is applied, the seat shakes, and when a large impact load is applied,
There was a problem in which the latch 9 and the striker 15 came off, causing the seat bag 6 to fall over and the seat cushion to float. Furthermore, it is difficult to apply the above-mentioned device to a small seat in which the seat back is provided inside the wheel house because a striker or the like is installed on the wheel house.

B. Purpose of the invention This invention can simultaneously prevent the seat bag from falling forward and prevent the seat cushion from rising.
Even if a large impact load is applied to the seat, the entire seat can be securely secured, and the seat bag and seat cushion can be easily locked and unlocked. The object is to provide a locking device that can increase space.

C. Structure of the invention This invention consists of a seat cushion frame that constitutes a seat cushion, a base fixed to the rear end of the seat cushion frame, and a seat bag rotatably attached to the upper end of the base via a rotating shaft. a locking pin that is fixed through the lower end of the seatback frame and positions the seatback frame with its outer end touching the rear end surface of the base; and a locking pin that is rotatably attached to the base and is locked by a spring. The lock lever is fixed to the vehicle body stationary member and engages with the lock pin on the outside of the base. The seat cushion has an engaging bracket that locks the seat cushion, and the seat bag and the seat cushion are unlocked by rotating the lock lever in the releasing direction and tilting the seat bag forward.

The above lock device prevents the seat bag from falling forward by engaging the rear end hook of the lock lever with the lock pin on the inside of the base, and locking the seat cushion by engaging the lock pin with the engagement bracket on the outside of the base. Prevent floating. Then, by rotating the lock lever in the release direction and tilting the seat bag forward, the seat bag and seat cushion will be unlocked and the seat can be easily folded.When the seat cushion and seat bag are returned, the lock will be automatically unlocked. It will be done. In addition, when the seat is folded, only a small engagement bracket remains on the vehicle body side, so the interior space is not compromised, the vehicle does not interfere with storing luggage, etc., and safety is high.

D. Embodiment FIGS. 6 to 8 are drawings showing an embodiment of the present invention, in which the invention is applied to a rear seat provided between wheel houses. In the same figure, 2
1 is a seat cushion constituting the rear seat 20; 22 is a seat back; the lower part of the seat back frame 25 is attached to the upper end of a triangular base 24 fixed to the rear end of the seat cushion frame 23; The seat bag 22 is rotatably supported via the seat cushion 21.
It is configured to be rotatable about a rotation support shaft 26 as a fulcrum. 27 is a front seat leg welded and fixed to the front lower surface of the seat cushion 21;
Its lower end is rotatably attached to the floor deck 29 of the vehicle body via a hinge 28.
The seat cushion 21 is rotatable forward about 8 as a fulcrum. 30 is seat cushion 2
This rear seat leg is foldably attached to the rear lower surface of the seat cushion 1, and its lower end is placed on a floor deck 29, and when the seat cushion 21 is raised, it is folded and stored.

31 is the rotation support shaft 2 of the seat back frame 25
A lock pin 31 is fixedly installed at the lower end portion below 6 in the vehicle width direction, and when the seat back 22 is raised, the outer end of the lock pin 31 comes into contact with the rear end of the base 24, thereby adjusting the raised position of the seat back 22. regulate. Reference numeral 32 denotes a lock lever rotatably connected to a shaft 33 fixed to the base 24; a spring is wound around the shaft 33 and has one end locked to the lock lever 32 and the other end locked to the base 24; A rotational force is always applied in the locking direction (counterclockwise) at 34, and when the seat bag 22 is raised, the rear end hook portion 32a of the lock lever 32 engages with the lock pin 31 to lock the seat bag 22. . Reference numeral 35 designates an engagement bracket that is fixed by welding or bolting to the inner surface of a vehicle body stationary member located on the side of the rear seat 20, such as the wheel house 36, and includes an upper end engagement portion 37.
is bent horizontally in the vehicle width direction, and this engaging portion 37
The outer end of the lock pin 31 engages with the lower surface of the seat cushion 21 to lock the seat cushion 21.

The above locking device is configured when the rear seat 20 is configured.
Seat cushion 21 to front seat leg 2
When the seat bag 22 is placed on the floor deck 29 via the rear seat legs 30 and 7 and the rear seat legs 30, and then the seat bag 22 is raised, the seat bag 22 rotates around the rotational support shaft 26 provided on the base 24, which causes the lock pin 31 to move in an arc. The inner end of the lock pin 31 slides over the upper part of the rear end hook part 32a of the lock lever 32, which is waiting, and pushes it down against the spring 34, so that the outer end of the lock pin 31 comes into contact with the rear end of the base 24, and the seatback is lifted. 22 is stopped in the upright position, and the inner end engages with the rear end hook portion 32a of the lock lever 32 to lock the seat back 22. At the same time as the seat bag 22 is locked, the outer end of the lock pin 31 enters and engages with the lower part of the engagement portion 37 of the engagement bracket 35 fixed to the wheel house 36, thereby locking the seat cushion 21. The entire rear seat 20 is fixed.

When folding, the lock lever 32 is moved by the spring 34.
When the seat bag 22 is rotated in the unlocking direction (clockwise) against this, the hook portion 32a unlocks the lock pin 31 and the lock pin 31 becomes free, allowing the seat bag 22 to rotate. When tilted forward, the seat bag 22 rotates about the rotating support shaft 26 as a fulcrum, and the seat bag 22 is folded onto the seat cushion 21. As the seat bag 22 rotates, the lock pin 31 is disengaged from the engagement bracket 35, so the seat cushion 21 is unlocked and becomes rotatable, and after the seat bag 22 is folded, the seat cushion 21
When you stand up forward, the front seat legs 2
The seat bag 22 and the seat cushion 21 can be folded forward by rotating around the hinge 28 at the lower end of the seat 7.

The locking device may be provided on one or both sides of the seat.

E. Effects of the invention This invention has an arrangement in which the inner end of the lock pin provided on the seat cushion frame locks the seat back by engaging with the hook portion of the lock lever supported by the base integral with the seat cushion frame, and the outer end of the lock pin engages with an engagement bracket fixed to a stationary member of the vehicle body, locking the seat cushion and fixing the entire seat, so even if a large impact load is applied, the seat back will not fall forward or the seat cushion will rise. Since the seat is stable as a whole and does not rattle, no noise is generated during driving, and the seating comfort for the occupants is also good. Furthermore, when folding the seat, if you rotate the lock lever and fold down the seat bag, the lock will be released and both the seat bag and seat cushion can be folded, and if you return the seat cushion and seat bag to their original positions, the seat cushion and seat bag will be folded. Both are automatically locked, making operation easy. In addition, when the seat is folded, only a small engagement bracket remains on the vehicle body side, so the amount of protrusion into the cabin is small, so it does not interfere with storing luggage, etc., and the cabin space can be used widely and effectively. Even if a person rides on it, it is safe because the amount of protrusion is small.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional seat bag forward fall prevention device, Figs. 2 and 3 are perspective views of a conventional seat locking device, Figs. 4 and 5 are drawings showing its operation, and Figs. Figure 6 is a side view of the locking device according to the present invention, Figure 7 is a perspective view of the entire seat, and Figure 8 is a side view of the locking device according to the present invention.
The figure is a partial rear cross-sectional view. 20...Rear seat, 23...Seat cushion frame, 24...Base, 25...Seat back frame, 26...Rotation shaft, 31...Lock pin, 32...Lock lever, 32a...Hook part, 34... ...Spring, 35...Engagement bracket.

Claims (1)

[Scope of utility model registration request] A seat cushion frame constituting a seat cushion, a base fixed to the rear end of the seat cushion frame, a seat back frame constituting a seat back rotatably attached to the upper end of the base via a rotating support shaft, and a seat cushion frame. A lock pin is fixed through the lower end of the back frame and its outer end touches the rear end surface of the base to position the seat back frame, and a lock pin is rotatably attached to the base and applies rotational force in the locking direction by a spring. a lock lever whose rear end hook engages with a lock pin on the inside of the base to lock the seat cushion; and a lock lever which is fixed to a stationary member of the vehicle body and engages with a lock pin on the outside of the base to lock the seat cushion. 1. A locking device for an automobile seat, characterized in that the seat back and the seat cushion are unlocked by rotating a lock lever in a release direction and tilting the seat back forward.